ipython notebook - sympy printing

[Denis Akhiyarov]

can I pass mul_symbol='dot' to init_printing? I see that this was asked few years ago but not implemented. The problem is no separation between variables.

https://groups.google.com/forum/#!topic/sympy/TUfxX9J32XQ

[Denis Akhiyarov]

also mentioned here:

http://stackoverflow.com/questions/18478131/use-a-symbol-for-multiplication-operator-in-sympy-output-in-ipython-notebook

[Denis Akhiyarov]

3 issues on github seem to be related to this latex printing deficiency:

https://github.com/sympy/sympy/issues?utf8=%E2%9C%93&q=mul_symbol+

so this maybe a good starting point to fix this?

[Aaron Meurer]

init_printing() has an argument latex_printer, so you can do something like

init_printing(latex_printer=lambda *args, **kwargs: latex(*args,
mul_symbol='dot', **kwargs))

Aaron Meurer

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[Denis Akhiyarov]

this works great! Aaron, post your answer on SO, so that I can upvote it.

why is this not default behavior?

[Aaron Meurer]

I guess the default printing (space for mul) looks cleaner. Since
LaTeX printing can use variable spacing it's feasible to use a space
in this way (contrast this with the monospace Unicode printer, which
uses 'x⋅y' instead of 'x y').

Aaron Meurer

> https://groups.google.com/d/msgid/sympy/73b1d57d-735d-4883-ad12-6c549921107d%40googlegroups.com.